2. • They include
nitrogen,
oxygen, argon,
carbon dioxide
and other
noble gasses
• The gas that is
most abundant
is nitrogen

3. •Water vapor
•Aerosols
•Ozone

4. –Up to about 4% of the
air's volume
–Forms clouds and
precipitation
–Absorbs heat energy
from Earth

5. –Tiny solid and liquid
particles
–Water vapor can condense
on solids
–Reflect sunlight
–Help color sunrise and
sunset

6. –Three atom oxygen (O3)
–Distribution not uniform
–Concentrated between 10 to
50 kilometers above the
surface
–Absorbs harmful UV radiation
–Human activity is depleting
ozone by adding
chlorofluorocarbons (CFCs)

9. • Weather is over a short
period of time
• Constantly changing

10. •Climate is over a long
period of time
•Generalized,
composite of weather

11. •Temperature
•Humidity
•Cloudiness
•Precipitation
•Air pressure
•Wind speed
and direction

12. •Temperature is amount of heat in a
substance. Expressed in degrees
Fahrenheit or Centigrade (Celsius)
•Temperature is measure by an
instrument called a thermometer.

13. • The sun heats up the water on
land and causes evaporation.
• The moisture the is in the air is
called humidity.
• Saturated is when the air has
too much moisture and cannot
hold anymore.

14. • It is the ratio of how much
moisture is in the air and how
much the air can hold.
• 50% humidity means the air is
holding 50% moisture

16. • Wind is moving air in the
atmosphere.
• Air is always moving from high
pressure to low pressure.
• The strongest winds are
tornadoes, the air pressure is
extremely low.

17. • Wind speed is
measure in kilometres
per hour (kph). We
use a device called
an anemometer.
• Wind Direction is
always stated in
terms of where the
wind is coming
from.

18. • Wind Sock
»Weathervane

19. • When there is too much moisture, the water
will fall as precipitation.
• Precipitation will fall in two main forms: rain or
snow depending on the temperature of the air
through which the moisture will fall.
• Other forms of precipitation are sleet and hail.

21. • If the air is cooled
below the freezing
point of water, the
condensing
moisture is quickly
freeze into ice
crystals.
• The ice crystals join
to make snowflakes
• Snowflakes are
always six sided.

22. • When droplets
of moisture join
together
becoming
heavy enough
to fall to the
ground.

23. • Formed in
cumulonimbus
(storm) clouds.
They are
frozen droplets
of moisture.

24. • When falling rain
starts off in
warmer air, but
passes through air
below freezing,
the rain drops cool
and freeze onto
surfaces when
they hit the
ground.

25. • It takes 10 centimetres of snow to
make one centimeter of rain.
• Dew is moisture in the air cools off
at night. In the morning it is found
on everything. In colder
temperatures, dew is frost.

26. • The force that is applied on everything
on the Earth caused by the weight of
the air.
• Air particles are mobile, the exert
pressure on objects.
• High air pressure brings warm, dry air.
Low air pressure brings rain or
moisture

27. • Air pressure can change quickly, ie-when
a storm comes in.
• There are three factors that affect
air pressure: altitude, air mass
temperature and the amount of
moisture in the air.
• A Barometer is used to measure air
pressure.